Don't rest your case just yet.
So, we're all looking at these high rez pictures, at different wavelengths, false color, the whole works, and lo and behold: It's a cold war super-extra-secret human outpost. The news has gone more than viral.*
What do we do, now that we know? Go or no go? Not could we, would we?
Is anyone still there? Do they have some leftover nukes?
(I haven't read Turtledove's story)
*Imagine the discussions here on the HZ...now that'd be fun!